Matthew Blastares

Matthew Blastares (c. 1290–c. 1360) was a Byzantine Greek hieromonk and canonist active in Thessalonica. A scholar of the Monastery of Kyr Isaac, he opposed any doctrinal reconciliation with Rome.

In 1335 he compiled his best-known work, the Syntagma kata stoicheion, an alphabetically ordered collection of church canons and imperial laws that circulated widely across the Orthodox world. He died in Thessalonica after 1346.